Optical imaging lens

ABSTRACT

The present disclosure provides an optical imaging lens. The optical imaging lens may comprise six lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may shorten the system length and enlarge the view angle and aperture size.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of the application which claimspriority to P.R.C. Patent Application No. 201810768211.8 titled “OpticalImaging Lens,” filed Jul. 13, 2018, with the State Intellectual PropertyOffice of the People's Republic of China (SIPO).

TECHNICAL FIELD

The present disclosure relates to optical imaging lenses, andparticularly, optical imaging lenses having, in some embodiments, sixlens elements.

BACKGROUND

As the specifications of mobile electronical devices, such as cellphones, digital cameras, tablet computers, personal digital assistants(PDA), etc. rapidly evolve, various types of key components, such asoptical imaging lenses, are developed. Desirable objectives fordesigning an optical imaging lens may not be limited to compact sizesand imaging quality, but may also include good optical characteristicsalong with short focus lengths and large view angles. Traditional lenseswith great view angles are usually bulky and heavy, or suffer from poordistortion aberrations. However, size reduction of an optical imaginglens may not be achieved simply by proportionally shrinking the size ofeach element therein. Various aspects of the optical imaging lens, suchas production difficulty, yield, material property, etc. should be takeninto consideration. Accordingly, achieving good imaging quality in viewof the various relevant considerations and technical barriers may be achallenge in the industry.

SUMMARY

The present disclosure provides for optical imaging lenses. Bycontrolling the convex or concave shape of the surfaces of the lenselements and parameters to satisfy at least one inequality, the opticalimaging lens showing good imaging quality may be capable to provide ashortened system length, a large HFOV and an enlarged aperture.

In an example embodiment, an optical imaging lens may comprise six lenselements, hereinafter referred to as first, second, third, fourth, fifthand sixth lens elements and positioned sequentially from an object sideto an image side along an optical axis. Each of the first, second,third, fourth, fifth and sixth lens elements may also have anobject-side surface facing toward the object side and allowing imagingrays to pass through. Each of the first, second, third, fourth, fifthand sixth lens elements may also have an image-side surface facingtoward the image side and allowing the imaging rays to pass through.

In the specification, parameters used here are defined as follows: athickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis is represented by G12, a thickness of the second lenselement along the optical axis is represented by T2, a distance from theimage-side surface of the second lens element to the object-side surfaceof the third lens element along the optical axis is represented by G23,a thickness of the third lens element along the optical axis isrepresented by T3, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis is represented by G34, a thickness of the fourth lenselement along the optical axis is represented by T4, a distance from theimage-side surface of the fourth lens element to the object-side surfaceof the fifth lens element along the optical axis is represented by G45,a thickness of the fifth lens element along the optical axis isrepresented by T5, a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by G56, a thickness of the sixth lenselement along the optical axis is represented by T6, a distance from thesixth lens element to a filtering unit along the optical axis isrepresented by G6F, a thickness of the filtering unit along the opticalaxis is represented by TTF, a distance from the filtering unit to animage plane along the optical axis is represented by GFP, a focal lengthof the first lens element is represented by f1, a focal length of thesecond lens element is represented by f2, a focal length of the thirdlens element is represented by f3, a focal length of the fourth lenselement is represented by f4, a focal length of the fifth lens elementis represented by f5, a focal length of the sixth lens element isrepresented by f6, the refractive index of the first lens element isrepresented by n1, the refractive index of the second lens element isrepresented by n2, the refractive index of the third lens element isrepresented by n3, the refractive index of the fourth lens element isrepresented by n4, the refractive index of the fifth lens element isrepresented by n5, the refractive index of the sixth lens element isrepresented by n6, an abbe number of the first lens element isrepresented by V1, an abbe number of the second lens element isrepresented by V2, an abbe number of the third lens element isrepresented by V3, an abbe number of the fourth lens element isrepresented by V4, an abbe number of the fifth lens element isrepresented by V5, an abbe number of the sixth lens element isrepresented by V6, an effective focal length of the optical imaging lensis represented by EFL, a distance from the object-side surface of thefirst lens element to the image-side surface of the sixth lens elementalong the optical axis is represented by TL, a distance from theobject-side surface of the first lens element to the image plane alongthe optical axis, i.e. a system length is represented by TTL, a sum ofthe thicknesses of all six lens elements along the optical axis, i.e. asum of T1, T2, T3, T4, T5 and T6 is represented by ALT, a sum of adistance from the image-side surface of the first lens element to theobject-side surface of the second lens element along the optical axis, adistance from the image-side surface of the second lens element to theobject-side surface of the third lens element along the optical axis, adistance from the image-side surface of the third lens element to theobject-side surface of the fourth lens element along the optical axis, adistance from the image-side surface of the fourth lens element to theobject-side surface of the fifth lens element along the optical axis anda distance from the image-side surface of the fifth lens element to theobject-side surface of the sixth lens element along the optical axis,i.e. a sum of G12, G23, G34, G45 and G56 is represented by AAG, a backfocal length of the optical imaging lens, which is defined as thedistance from the image-side surface of the sixth lens element to theimage plane along the optical axis, i.e. a sum of G6F, TTF and GFP isrepresented by BFL, a half field of view angle of the optical imaginglens is represented by HFOV, and an image height of an image produced bythe optical imaging lens on an image plane is represented by ImgH.

In an aspect of the present disclosure, in the optical imaging lens, thefirst lens element has negative refracting power, a periphery region ofthe image-side surface of the second lens element is concave, an opticalaxis region of the object-side surface of the third lens element isconvex, an optical axis region of the image-side surface of the fifthlens element is convex, an optical axis region of the object-sidesurface of the sixth lens element is convex, a periphery region of theobject-side surface of the sixth lens element is concave, the opticalimaging lens comprises no other lens elements beyond the six lenselements, and optical imaging lens satisfies:

15.000°/mm≤HFOV/ImgH≤30.000°/mm   Inequality (3′); and

0.800≤(EFL+T2+T5+T6)/ALT≤1.600   Inequality (5′).

In another aspect of the present disclosure, in the optical imaginglens, the first lens element has negative refracting power, a peripheryregion of the object-side surface of the second lens element is convex,an optical axis region of the image-side surface of the fourth lenselement is concave, an optical axis region of the image-side surface ofthe fifth lens element is convex, an optical axis region of theobject-side surface of the sixth lens element is convex, the opticalimaging lens comprises no other lens elements beyond the six lenselements, and the optical imaging lens satisfies Inequality (3′).

In yet another aspect of the present disclosure, in the optical imaginglens, an optical axis region of the image-side surface of the first lenselement is concave, the sixth lens element has negative refractingpower, an optical axis region of the object-side surface of the sixthlens element is convex, the optical imaging lens comprises no other lenselements beyond the six lens elements, and the optical imaging lenssatisfies Inequality (3′) and

V1>V2+V4   Inequality (2).

In another example embodiment, other inequality(s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example:

(T4+AAG)/T2≤2.700   Inequality (1);

EFL/(T1+T3)≤3.900   Inequality (4);

(T1+T4+G34+G45)/(G12+G56)≤3.400   Inequality (6);

(AAG+T1)/T5≤2.400   Inequality (7);

V3>V2+V4   Inequality (8);

(EFL+TTL)/BFL≤6.200   Inequality (9);

EFL/(T5+T6)≤2.300   Inequality (10);

(EFL+TL)/ALT≤2.100   Inequality (11);

(T2+T4+G34+G56)/(G12+G23+G45)≤2.000   Inequality (12);

(AAG+T2)/T3≤2.500   Inequality (13);

V5>V2+V4   Inequality (14);

EFL/(T2+T3+T4)≤3.200   Inequality (15);

(EFL+AAG)/BFL≤3.100   Inequality (16);

(T2+T6+G45+G56)/T5≤2.500   Inequality (17); and/or

(AAG+T6)/T3≤3.100   Inequality (18).

In some example embodiments, more details about the convex or concavesurface structure, refracting power or chosen material etc. could beincorporated for one specific lens element or broadly for a plurality oflens elements to improve the control for the system performance and/orresolution. It is noted that the details listed herein could beincorporated in example embodiments if no inconsistency occurs.

The above example embodiments are not limiting and could be selectivelyincorporated in other embodiments described herein.

Through controlling the convex or concave shape of the surfaces and atleast one inequality, the optical imaging lens in example embodimentsmay achieve good imaging quality, effectively shorten the system lengthof the optical imaging lens, and broaden the HFOV and aperture of theoptical imaging lens.

BRIEF DESCRIPTION OF THE DRAWINGS

Example embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 depicts a cross-sectional view of one single lens elementaccording to the present disclosure;

FIG. 2 depicts a cross-sectional view showing the relation between theshape of a portion and the position where a collimated ray meets theoptical axis;

FIG. 3 depicts a cross-sectional view showing a first example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 4 depicts a cross-sectional view showing a second example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 5 depicts a cross-sectional view showing a third example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 6 depicts a cross-sectional view of a first embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 7 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a first embodiment of the opticalimaging lens according to the present disclosure;

FIG. 8 depicts a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 9 depicts a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 depicts a cross-sectional view of a second embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 11 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a second embodiment of the opticalimaging lens according to the present disclosure;

FIG. 12 depicts a table of optical data for each lens element of theoptical imaging lens of a second embodiment of the present disclosure;

FIG. 13 depicts a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 depicts a cross-sectional view of a third embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 15 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a third embodiment of the opticalimaging lens according to the present disclosure;

FIG. 16 depicts a table of optical data for each lens element of theoptical imaging lens of a third embodiment of the present disclosure;

FIG. 17 depicts a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 depicts a cross-sectional view of a fourth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 19 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fourth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 20 depicts a table of optical data for each lens element of theoptical imaging lens of a fourth embodiment of the present disclosure;

FIG. 21 depicts a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 depicts a cross-sectional view of a fifth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 23 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fifth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 24 depicts a table of optical data for each lens element of theoptical imaging lens of a fifth embodiment of the present disclosure;

FIG. 25 depicts a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 depicts a cross-sectional view of a sixth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 27 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a sixth embodiment of the opticalimaging lens according the present disclosure;

FIG. 28 depicts a table of optical data for each lens element of theoptical imaging lens of a sixth embodiment of the present disclosure;

FIG. 29 depicts a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 depicts a cross-sectional view of a seventh embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 31 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a seventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 32 depicts a table of optical data for each lens element of aseventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 33 depicts a table of aspherical data of a seventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 34 depicts a cross-sectional view of an eighth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 35 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of an eighth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 36 depicts a table of optical data for each lens element of aneighth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 37 depicts a table of aspherical data of an eighth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 38 depicts a cross-sectional view of a ninth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 39 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a ninth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 40 depicts a table of optical data for each lens element of a ninthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 41 depicts a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 depicts a cross-sectional view of a tenth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 43 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a tenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 44 depicts a table of optical data for each lens element of a tenthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 45 depicts a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 46 depicts a cross-sectional view of an eleventh embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 47 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of an eleventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 48 depicts a table of optical data for each lens element of aneleventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 49 depicts a table of aspherical data of an eleventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 50 depicts a cross-sectional view of a twelfth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 51 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a twelfth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 52 depicts a table of optical data for each lens element of atwelfth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 53 depicts a table of aspherical data of a twelfth embodiment ofthe optical imaging lens according to the present disclosure;

FIGS. 54 and 55 depict tables for the values of (T4+AAG)/T2, HFOV/ImgH,EFL/(T1+T3), (EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 of all twelve example embodiments.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons of ordinary skill in the arthaving the benefit of the present disclosure will understand othervariations for implementing embodiments within the scope of the presentdisclosure, including those specific examples described herein. Thedrawings are not limited to specific scale and similar reference numbersare used for representing similar elements. As used in the disclosuresand the appended claims, the terms “example embodiment,” “exemplaryembodiment,” and “present embodiment” do not necessarily refer to asingle embodiment, although it may, and various example embodiments maybe readily combined and interchanged, without departing from the scopeor spirit of the present disclosure. Furthermore, the terminology asused herein is for the purpose of describing example embodiments onlyand is not intended to be a limitation of the disclosure. In thisrespect, as used herein, the term “in” may include “in” and “on”, andthe terms “a”, “an” and “the” may include singular and pluralreferences. Furthermore, as used herein, the term “by” may also mean“from”, depending on the context. Furthermore, as used herein, the term“if” may also mean “when” or “upon”, depending on the context.Furthermore, as used herein, the words “and/or” may refer to andencompass any and all possible combinations of one or more of theassociated listed items.

In the present disclosure, the optical system may comprise at least onelens element to receive imaging rays that are incident on the opticalsystem over a set of angles ranging from parallel to an optical axis toa half field of view (HFOV) angle with respect to the optical axis. Theimaging rays pass through the optical system to produce an image on animage plane. The term “a lens element having positive refracting power(or negative refracting power)” means that the paraxial refracting powerof the lens element in Gaussian optics is positive (or negative). Theterm “an object-side (or image-side) surface of a lens element” refersto a specific region of that surface of the lens element at whichimaging rays can pass through that specific region. Imaging rays includeat least two types of rays: a chief ray Lc and a marginal ray Lm (asshown in FIG. 1). An object-side (or image-side) surface of a lenselement can be characterized as having several regions, including anoptical axis region, a periphery region, and, in some cases, one or moreintermediate regions, as discussed more fully below.

FIG. 1 is a radial cross-sectional view of a lens element 100. Tworeferential points for the surfaces of the lens element 100 can bedefined: a central point , and a transition point . The central point ofa surface of a lens element is a point of intersection of that surfaceand the optical axis I. As illustrated in FIG. 1, a first central pointCP1 may be present on the object-side surface 110 of lens element 100and a second central point CP2 may be present on the image-side surface120 of the lens element 100. The transition point is a point on asurface of a lens element, at which the line tangent to that point isperpendicular to the optical axis I. The optical boundary OB of asurface of the lens element is defined as a point at which the radiallyoutermost marginal ray Lm passing through the surface of the lenselement intersects the surface of the lens element. All transitionpoints lie between the optical axis I and the optical boundary OB of thesurface of the lens element. If multiple transition points are presenton a single surface, then these transition points are sequentially namedalong the radial direction of the surface with reference numeralsstarting from the first transition point. For example, the firsttransition point, e.g., TP1, (closest to the optical axis I), the secondtransition point, e.g., TP2, (as shown in FIG. 4), and the Nthtransition point (farthest from the optical axis I).

The region of a surface of the lens element from the central point tothe first transition point TP1 is defined as the optical axis region,which includes the central point . The region located radially outsideof the farthest Nth transition point from the optical axis I to theoptical boundary OB of the surface of the lens element is defined as theperiphery region. In some embodiments, there may be intermediate regionspresent between the optical axis region and the periphery region, withthe number of intermediate regions depending on the number of thetransition points.

The shape of a region is convex if a collimated ray being parallel tothe optical axis I and passing through the region is bent toward theoptical axis I such that the ray intersects the optical axis I on theimage side A2 of the lens element. The shape of a region is concave ifthe extension line of a collimated ray being parallel to the opticalaxis I and passing through the region intersects the optical axis I onthe object side A1 of the lens element.

Additionally, referring to FIG. 1, the lens element 100 may also have amounting portion 130 extending radially outward from the opticalboundary OB. The mounting portion 130 is typically used to physicallysecure the lens element to a corresponding element of the optical system(not shown). Imaging rays do not reach the mounting portion 130. Thestructure and shape of the mounting portion 130 are only examples toexplain the technologies, and should not be taken as limiting the scopeof the present disclosure. The mounting portion 130 of the lens elementsdiscussed below may be partially or completely omitted in the followingdrawings.

Referring to FIG. 2, optical axis region Z1 is defined between centralpoint CP and first transition point TP1. Periphery region Z2 is definedbetween TP1 and the optical boundary OB of the surface of the lenselement. Collimated ray 211 intersects the optical axis I on the imageside A2 of lens element 200 after passing through optical axis regionZ1, i.e., the focal point of collimated ray 211 after passing throughoptical axis region Z1 is on the image side A2 of the lens element 200at point R in FIG. 2. Accordingly, since the ray itself intersects theoptical axis I on the image side A2 of the lens element 200, opticalaxis region Z1 is convex. On the contrary, collimated ray 212 divergesafter passing through periphery region Z2. The extension line EL ofcollimated ray 212 after passing through periphery region Z2 intersectsthe optical axis I on the object side A1 of lens element 200, i.e., thefocal point of collimated ray 212 after passing through periphery regionZ2 is on the object side A1 at point M in FIG. 2. Accordingly, since theextension line EL of the ray intersects the optical axis I on the objectside A1 of the lens element 200, periphery region Z2 is concave. In thelens element 200 illustrated in FIG. 2, the first transition point TP1is the border of the optical axis region and the periphery region, i.e.,TP1 is the point at which the shape changes from convex to concave.

Alternatively, there is another way for a person having ordinary skillin the art to determine whether an optical axis region is convex orconcave by referring to the sign of “Radius” (the “R” value), which isthe paraxial radius of shape of a lens surface in the optical axisregion. The R value is commonly used in conventional optical designsoftware such as Zemax and CodeV. The R value usually appears in thelens data sheet in the software. For an object-side surface, a positiveR value defines that the optical axis region of the object-side surfaceis convex, and a negative R value defines that the optical axis regionof the object-side surface is concave. Conversely, for an image-sidesurface, a positive R value defines that the optical axis region of theimage-side surface is concave, and a negative R value defines that theoptical axis region of the image-side surface is convex. The resultfound by using this method should be consistent with the methodutilizing intersection of the optical axis by rays/extension linesmentioned above, which determines surface shape by referring to whetherthe focal point of a collimated ray being parallel to the optical axis Iis on the object-side or the image-side of a lens element. As usedherein, the terms “a shape of a region is convex (concave),” “a regionis convex (concave),” and “a convex- (concave-) region,” can be usedalternatively.

FIG. 3, FIG. 4 and FIG. 5 illustrate examples of determining the shapeof lens element regions and the boundaries of regions under variouscircumstances, including the optical axis region, the periphery region,and intermediate regions as set forth in the present specification.

FIG. 3 is a radial cross-sectional view of a lens element 300. Asillustrated in FIG. 3, only one transition point TP1 appears within theoptical boundary OB of the image-side surface 320 of the lens element300. Optical axis region Z1 and periphery region Z2 of the image-sidesurface 320 of lens element 300 are illustrated. The R value of theimage-side surface 320 is positive (i.e., R>0). Accordingly, the opticalaxis region Z1 is concave.

In general, the shape of each region demarcated by the transition pointwill have an opposite shape to the shape of the adjacent region(s).Accordingly, the transition point will define a transition in shape,changing from concave to convex at the transition point or changing fromconvex to concave. In FIG. 3, since the shape of the optical axis regionZ1 is concave, the shape of the periphery region Z2 will be convex asthe shape changes at the transition point TP1.

FIG. 4 is a radial cross-sectional view of a lens element 400. Referringto FIG. 4, a first transition point TP1 and a second transition pointTP2 are present on the object-side surface 410 of lens element 400. Theoptical axis region Z1 of the object-side surface 410 is defined betweenthe optical axis I and the first transition point TP1. The R value ofthe object-side surface 410 is positive (i.e., R>0). Accordingly, theoptical axis region Z1 is convex.

The periphery region Z2 of the object-side surface 410, which is alsoconvex, is defined between the second transition point TP2 and theoptical boundary OB of the object-side surface 410 of the lens element400. Further, intermediate region Z3 of the object-side surface 410,which is concave, is defined between the first transition point TP1 andthe second transition point TP2. Referring once again to FIG. 4, theobject-side surface 410 includes an optical axis region Z1 locatedbetween the optical axis I and the first transition point TP1, anintermediate region Z3 located between the first transition point TP1and the second transition point TP2, and a periphery region Z2 locatedbetween the second transition point TP2 and the optical boundary OB ofthe object-side surface 410. Since the shape of the optical axis regionZ1 is designed to be convex, the shape of the intermediate region Z3 isconcave as the shape of the intermediate region Z3 changes at the firsttransition point TP1, and the shape of the periphery region Z2 is convexas the shape of the periphery region Z2 changes at the second transitionpoint TP2.

FIG. 5 is a radial cross-sectional view of a lens element 500. Lenselement 500 has no transition point on the object-side surface 510 ofthe lens element 500. For a surface of a lens element with no transitionpoint , for example, the object-side surface 510 the lens element 500,the optical axis region Z1 is defined as the region between 0-50% of thedistance between the optical axis I and the optical boundary OB of thesurface of the lens element and the periphery region is defined as theregion between 50%-100% of the distance between the optical axis I andthe optical boundary OB of the surface of the lens element. Referring tolens element 500 illustrated in FIG. 5, the optical axis region Z1 ofthe object-side surface 510 is defined between the optical axis I and50% of the distance between the optical axis I and the optical boundaryOB. The R value of the object-side surface 510 is positive (i.e., R>0).Accordingly, the optical axis region Z1 is convex. For the object-sidesurface 510 of the lens element 500, because there is no transitionpoint , the periphery region Z2 of the object-side surface 510 is alsoconvex. It should be noted that lens element 500 may have a mountingportion (not shown) extending radially outward from the periphery regionZ2.

In the present disclosure, examples of an optical imaging lens which maybe a prime lens are provided. Example embodiments of an optical imaginglens may comprise a first lens element, a second lens element, a thirdlens element, a fourth lens element, a fifth lens element and a sixthlens element. Each of the lens elements may comprise an object-sidesurface facing toward an object side allowing imaging rays to passthrough and an image-side surface facing toward an image side allowingthe imaging rays to pass through. These lens elements may be arrangedsequentially from the object side to the image side along an opticalaxis, and example embodiments of the lens may comprise no other lenseshaving refracting power beyond the six lens elements. Throughcontrolling the convex or concave shape of the surfaces, the opticalimaging lens in example embodiments may achieve good imaging quality,effectively shorten the system length of the optical imaging lens andbroaden the HFOV and aperture of the optical imaging lens.

In some embodiments, the lens elements are designed in light of theoptical characteristics and the system length of the optical imaginglens. For example, through the surface shapes comprising negativerefracting power of the first lens element, the convex optical axisregion of the object-side surface of the first lens element, the concaveperiphery region of the image-side surface of the second lens element,the convex periphery region of the object-side surface of the third lenselement, the concave optical axis region of the object-side surface ofthe fifth lens element and one of the negative refracting power of thefourth lens element, the concave optical axis region of the object-sidesurface of the fourth lens element and the concave periphery region ofthe object-side surface of the fourth lens element, it may be beneficialto enlarge the half field of view angle without increasing the systemlength of the optical imaging lens. When the optical imaging lenssatisfies the Inequality (1), the distortion aberration generated in theoptical imaging lens may be well adjusted. Preferably, the opticalimaging lens may satisfy 1.400≤(T4+AAG)/T2≤2.700.

Additionally, the parameters may be further controlled for an opticalimaging lens with good optical characteristics, shortened system lengthand manufacturability. For example, When the optical imaging lenssatisfies the Inequalities (2), (8) or (14) along with aforesaid surfaceshapes, the chromatic aberration may be well adjusted.

When the optical imaging lens satisfies the Inequality (3), theresolution of an image sensor may be promoted and meanwhile the halffield of view angle may be presented. Preferably, the optical imaginglens may satisfy 15.000°/mm≤HFOV/ImgH≤30.000°/mm.

When the optical imaging lens satisfies the Inequalities (4), (5), (9),(10), (11), (15) and (16), the system focal length and each parametermay be a proper value to avoid any excessive value of the parameterswhich may be unfavorable to the adjustment of the aberration of thewhole system of the optical imaging lens, and to avoid any insufficientvalue of the parameters which may increase the production difficulty ofthe optical imaging lens. Preferably, the optical imaging lens maysatisfy at least one of 1.000≤EFL/(T1+T3)≤3.900,0.800≤(EFL+T2+T5+T6)/ALT≤1.600, 4.000≤(EFL+TTL)/BFL≤6.200,0.900≤EFL/(T5+T6)≤2.300, 1.300≤(EFL+TL)/ALT≤2.100,0.700≤EFL/(T2+T3+T4)≤3.200 or 1.400≤(EFL+AAG)/BFL≤3.100.

When the optical imaging lens satisfies the Inequalities (6), (7), (12),(13), (17) and (18), the thickness of the lens elements and/or the airgaps between the lens elements may be shortened properly to avoid anyexcessive value of the parameters which may be unfavorable and maythicken the system length of the whole system of the optical imaginglens, and to avoid any insufficient value of the parameters which mayincrease the production difficulty of the optical imaging lens.Preferably, the optical imaging lens may satisfy at least one of1.300≤(T1+T4+G34+G45)/(G12+G56)≤3.400, 0.900≤(AAG+T1)/T5≤2.400,1.000≤(T2+T4+G34+G56)/(G12+G23+G45)≤2.000, 0.900≤(AAG+T2)/T3≤2.500,1.000≤(T2+T6+G45+G56)/T5≤2.500 or 0.900≤(AAG+T6)/T3≤3.100.

In light of the unpredictability in an optical system, satisfying theseinequalities listed above may result in shortening the system length ofthe optical imaging lens, lowering the f-number, enlarging the shotangle, promoting the imaging quality and/or increasing the yield in theassembly process in the present disclosure.

When implementing example embodiments, more details about the convex orconcave surface or refracting power could be incorporated for onespecific lens element or broadly for a plurality of lens elements toimprove the control for the system performance and/or resolution, orpromote the yield. For example, in an example embodiment, each lenselement may be made from all kinds of transparent material, such asglass, resin, etc. It is noted that the details listed here could beincorporated in example embodiments if no inconsistency occurs.

Several example embodiments and associated optical data will now beprovided for illustrating example embodiments of an optical imaging lenswith a short system length, good optical characteristics, a wide viewangle and/or a low f-number. Reference is now made to FIGS. 6-9. FIG. 6illustrates an example cross-sectional view of an optical imaging lens 1having six lens elements of the optical imaging lens according to afirst example embodiment. FIG. 7 shows example charts of a longitudinalspherical aberration and other kinds of optical aberrations of theoptical imaging lens 1 according to an example embodiment. FIG. 8illustrates an example table of optical data of each lens element of theoptical imaging lens 1 according to an example embodiment. FIG. 9depicts an example table of aspherical data of the optical imaging lens1 according to an example embodiment.

As shown in FIG. 6, the optical imaging lens 1 of the present embodimentmay comprise, in the order from an object side A1 to an image side A2along an optical axis, a first lens element L1, a second lens elementL2, an aperture stop STO, a third lens element L3, a fourth lens elementL4, a fifth lens element L5 and a sixth lens element L6. A filteringunit TF and an image plane IMA of an image sensor may be positioned atthe image side A2 of the optical lens 1. Each of the first, second,third, fourth, fifth and sixth lens elements L1, L2, L3, L4, L5, L6 andthe filtering unit TF may comprise an object-side surfaceL1A1/L2A1/L3A1/L4A1/L5A1/L6A1/TFA1 facing toward the object side A1 andan image-side surface L1A2/L2A2/L3A2/L4A2/L5A2/L6A2/TFA2 facing towardthe image side A2. The filtering unit TF, positioned between the sixthlens element L6 and the image plane IMA, may selectively absorb lightwith specific wavelength(s) from the light passing through opticalimaging lens 1. The example embodiment of the filtering unit TF whichmay selectively absorb light with specific wavelength(s) from the lightpassing through optical imaging lens 1 may be an IR cut filter (infraredcut filter). Then, IR light may be absorbed, and this may prohibit theIR light, which might not be seen by human eyes, from producing an imageon the image plane IMA.

Please note that during the normal operation of the optical imaging lens1, the distance between any two adjacent lens elements of the first,second, third, fourth, fifth and sixth lens elements L1, L2, L3, L4, L5,and L6 may be an unchanged value, i.e. the optical imaging lens 1 may bea prime lens.

Example embodiments of each lens element of the optical imaging lens 1,which may be constructed by glass, plastic material or other transparentmaterial, will now be described with reference to the drawings.

An example embodiment of the first lens element L1, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L1A1, an optical axis region L1A1C may be convexand a periphery region L1A1P may be convex. On the image-side surfaceL1A2, an optical axis region L1A2C may be concave and a periphery regionL1A2P may be concave.

An example embodiment of the second lens element L2, which may beconstructed by plastic material, may have positive refracting power. Onthe object-side surface L2A1, an optical axis region L2A1C may be convexand a periphery region L2A1P may be convex. On the image-side surfaceL2A2, an optical axis region L2A2C may be concave and a periphery regionL2A2P may be concave.

An example embodiment of the third lens element L3, which may beconstructed by plastic material, may have positive refracting power. Onthe object-side surface L3A1, an optical axis region L3A1C may be convexand a periphery region L3A1P may be convex. On the image-side surfaceL3A2, an optical axis region L3A2C may be convex and a periphery regionL3A2P may be convex.

An example embodiment of the fourth lens element L4, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L4A1, an optical axis region L4A1C may beconcave and a periphery region L4A1P may be concave. On the image-sidesurface L4A2, an optical axis region L4A2C may be concave and aperiphery region L4A2P may be convex.

An example embodiment of the fifth lens element L5, which may beconstructed by plastic material, may have positive refracting power. Onthe object-side surface L5A1, an optical axis region L5A1C may beconcave and a periphery region L5A1P may be concave. On the image-sidesurface L5A2, an optical axis region L5A2C may be convex and a peripheryregion L5A2P may be concave.

An example embodiment of the sixth lens element L6, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L6A1, an optical axis region L6A1C may be convexand a periphery region L6A1P may be concave. On the image-side surfaceL6A2, an optical axis region L6A2C may be concave and a periphery regionL6A2P may be convex.

In example embodiments, air gaps may exist between each pair of adjacentlens elements, as well as between the sixth lens element L6 and thefiltering unit TF, and the filtering unit TF and the image plane IMA ofthe image sensor. Please note, in other embodiments, any of theaforementioned air gaps may or may not exist. For example, profiles ofopposite surfaces of a pair of adjacent lens elements may align withand/or attach to each other, and in such situations, the air gap mightnot exist.

FIG. 8 depicts the optical characteristics of each lens elements in theoptical imaging lens 1 of the present embodiment. Please also refer toFIG. 54 for the values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3),(EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 corresponding to the present embodiment.

The aspherical surfaces, including the object-side surface L1A1 and theimage-side surface L1A2 of the first lens element L1, the object-sidesurface L2A1 and the image-side surface L2A2 of the second lens elementL2, the object-side surface L3A1 and the image-side surface L3A2 of thethird lens element L3, the object-side surface L4A1 and the image-sidesurface L4A2 of the fourth lens element L4, the object-side surface L5A1and the image-side surface L5A2 of the fifth lens element L5 and theobject-side surface L6A1 and the image-side surface L6A2 of the sixthlens element L6 may all be defined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{i} \times Y^{i}}}}$

wherein, Y represents the perpendicular distance between the point ofthe aspherical surface and the optical axis; Z represents the depth ofthe aspherical surface (the perpendicular distance between the point ofthe aspherical surface at a distance Y from the optical axis and thetangent plane of the vertex on the optical axis of the asphericalsurface); R represents the radius of curvature of the surface of thelens element; K represents a conic constant; a, represents an asphericalcoefficient of i^(th) level. The values of each aspherical parameter areshown in FIG. 9.

Referring to FIG. 7(a), a longitudinal spherical aberration of theoptical imaging lens in the present embodiment is shown in coordinatesin which the horizontal axis represents focus and the vertical axisrepresents field of view, and FIG. 7(b), curvature of field of theoptical imaging lens in the present embodiment in the sagittal directionis shown in coordinates in which the horizontal axis represents focusand the vertical axis represents image height, and FIG. 7(c), curvatureof field in the tangential direction of the optical imaging lens in thepresent embodiment is shown in coordinates in which the horizontal axisrepresents focus and the vertical axis represents image height, and FIG.7(d), distortion aberration of the optical imaging lens in the presentembodiment is shown in coordinates in which the horizontal axisrepresents percentage and the vertical axis represents image height.

The curves of different wavelengths (470 nm, 555 nm, 650 nm) may beclose to each other. This represents that off-axis light with respect tothese wavelengths may be focused around an image point. From thevertical deviation of each curve shown therein, the offset of theoff-axis light relative to the image point may be within about−0.03˜0.02 mm. Therefore, the present embodiment may improve thelongitudinal spherical aberration with respect to different wavelengths.For curvature of field in the sagittal direction, the focus variationwith respect to the three wavelengths in the whole field may fall withinabout −0.1˜0.1 mm, for curvature of field in the tangential direction,the focus variation with respect to the three wavelengths in the wholefield may fall within about −0.1˜0.6 mm, and the variation of thedistortion aberration may be within about −4˜4.5%.

According to the values of the aberrations, it is shown that the opticalimaging lens 1 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.558 and the system length asshort as about 6.340 mm, may be capable of providing good imagingquality as well as good optical characteristics.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 2 having six lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 11 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment.

As shown in FIG. 10, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the second embodiment and the first embodimentmay include the radius of curvature, thickness of each lens element, thevalue of each air gap, aspherical data, related optical parameters, suchas back focal length, and the configuration of the concave/convex shapeof the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Here and in the embodiments hereinafter, for clearly showingthe drawings of the present embodiment, only the surface shapes whichare different from that in the first embodiment may be labeled.Specifically, the differences of configuration of surface shape mayinclude: on the image-side surface L5A2 of the fifth lens element L5, aperiphery region L5A2P may be convex. Please refer to FIG. 12 for theoptical characteristics of each lens elements in the optical imaginglens 2 of the present embodiment, and please refer to FIG. 54 for thevalues of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 11(a), the offsetof the off-axis light relative to the image point may be within about−0.025˜0.005 mm. As the curvature of field in the sagittal directionshown in FIG. 11(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.05˜0.03 mm. Asthe curvature of field in the tangential direction shown in FIG. 11(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.6˜0.7 mm. As shown in FIG. 11(d), thevariation of the distortion aberration may be within about −4˜3%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in sagittal direction and thedistortion aberration of the optical imaging lens 2 may be smaller.

According to the value of the aberrations, it is shown that the opticalimaging lens 2 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 1.701 and the system length asshort as about 5.548 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length may be shorter in the present embodiment.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 3 having six lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 15 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 16 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 17 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment.

As shown in FIG. 14, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the third embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L5A2 of the fifth lenselement L5, a periphery region L5A2P may be convex. Please refer to FIG.16 for the optical characteristics of each lens elements in the opticalimaging lens 3 of the present embodiment, and please refer to FIG. 54for the values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3),(EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 15(a), the offsetof the off-axis light relative to the image point may be within about−0.015˜0.05 mm. As the curvature of field in the sagittal directionshown in FIG. 15(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.15˜0.05 mm. Asthe curvature of field in the tangential direction shown in FIG. 15(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.1˜0.25 mm. As shown in FIG. 15(d), thevariation of the distortion aberration may be within about −30˜0%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in the sagittal direction may besmaller in the present embodiment.

According to the value of the aberrations, it is shown that the opticalimaging lens 3 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.774 and the system length asshort as about 5.391 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 3 in the presentembodiment may be shorter.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 4 having six lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 19 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 20 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment.

As shown in FIG. 18, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the fourth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2, L5A2; but the configuration ofthe concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L4A1, L5A1 and L6A1 facing to the object side A1and the image-side surfaces L1A2, L2A2, L3A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L4A2 of the fourth lenselement L4, an optical axis region L4A2C may be convex, on theimage-side surface L5A2 of the fifth lens element L5, a periphery regionL5A2P may be convex. Please refer to FIG. 20 for the opticalcharacteristics of each lens elements in the optical imaging lens 4 ofthe present embodiment, please refer to FIG. 54 for the values of(T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 19(a), the offsetof the off-axis light relative to the image point may be within about−0.014˜0.02 mm. As the curvature of field in the sagittal directionshown in FIG. 19(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.06˜0.02 mm. Asthe curvature of field in the tangential direction shown in FIG. 19(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.14˜0.02 mm. As shown in FIG. 19(d), thevariation of the distortion aberration may be within about 10˜1%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in both the sagittal and tangentialdirections and the distortion aberration may be smaller in the presentembodiment.

According to the value of the aberrations, it is shown that the opticalimaging lens 4 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.191 and the system length asshort as about 5.855 mm, may be capable of providing good imagingquality. Compared with the optical imaging lens 1 of the firstembodiment, the aperture may be greater and the system length of theoptical imaging lens 4 in the present embodiment may be shorter.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 5 having six lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 23 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment.

As shown in FIG. 22, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the fifth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2 and L5A2; but the configuration ofthe concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L3A1, L4A, L5A1 and L6A1 facing to the object sideA1 and the image-side surfaces L1A2, L2A2, L3A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L4A2 of the fourth lenselement L4, an optical axis region L4A2C may be convex, on theimage-side surface L5A2 of the fifth lens element L5, a periphery regionL5A2P may be convex. Please refer to FIG. 24 for the opticalcharacteristics of each lens elements in the optical imaging lens 5 ofthe present embodiment, please refer to FIG. 54 for the values of(T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 23(a), the offsetof the off-axis light relative to the image point may be within about−0.025˜0.035 mm. As the curvature of field in the sagittal directionshown in FIG. 23(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.1˜0.5 mm. As thecurvature of field in the tangential direction shown in FIG. 23(c), thefocus variation with regard to the three wavelengths in the whole fieldmay fall within about −0.15˜0.3 mm. As shown in FIG. 23(d), thevariation of the distortion aberration may be within about −16˜0%.Compared with the first embodiment, the curvature of field in both thesagittal and tangential directions and the distortion aberration may besmaller in the present embodiment.

According to the value of the aberrations, it is shown that the opticalimaging lens 5 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.360 and the system length asshort as about 5.784 mm, may be capable of providing good imagingquality. Compared with the optical imaging lens 1 of the firstembodiment, the aperture may be greater and system length of the opticalimaging lens 5 in the present embodiment may be shorter.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 6 having six lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 27 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 28 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment.

As shown in FIG. 26, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the sixth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L5A2 of the fifth lenselement L5, a periphery region L5A2P may be convex. Please refer to FIG.28 for the optical characteristics of each lens elements in the opticalimaging lens 6 of the present embodiment, please refer to FIG. 54 forthe values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 27(a), the offsetof the off-axis light relative to the image point may be within about−0.01˜0.012 mm. As the curvature of field in the sagittal directionshown in FIG. 27(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.1˜0.05 mm. Asthe curvature of field in the tangential direction shown in FIG. 27(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.3˜0.4 mm. As shown in FIG. 27(d), thevariation of the distortion aberration may be within about −4˜6%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in the sagittal direction may besmaller in the present embodiment.

According to the value of the aberrations, it is shown that the opticalimaging lens 6 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 1.898 and the system length asshort as about 5.896 mm, may be capable of providing desirable imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 6 in the presentembodiment may be shorter.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 7 having six lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 31 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment.

As shown in FIG. 30, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the seventh embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2, L5A2 and L6A2; but theconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to theobject side A1 and the image-side surfaces L1A2, L2A2 and L3A2 facing tothe image side A2, and positive or negative configuration of therefracting power of each lens element may be similar to those in thefirst embodiment. Specifically, the differences of configuration ofsurface shape may include: on the image-side surface L4A2 of the fourthlens element L4, an optical axis region L4A2C may be convex; on theimage-side surface L5A2 of the fifth lens element L5, a periphery regionL5A2P may be convex; on the image-side surface L6A2 of the sixth lenselement L6, a periphery region L6A2P may be concave. Please refer toFIG. 32 for the optical characteristics of each lens elements in theoptical imaging lens 7 of the present embodiment, please refer to FIG.55 for the values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3),(EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3 +T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 31(a), the offsetof the off-axis light relative to the image point may be within about−0.035˜0.035 mm. As the curvature of field in the sagittal directionshown in FIG. 31(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.05˜0.03 mm. Asthe curvature of field in the tangential direction shown in FIG. 31(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.09˜0.03 mm. As shown in FIG. 31(d), thevariation of the distortion aberration may be within about −16˜2%.Compared with the first embodiment, the longitudinal sphericalaberration may be smaller here.

According to the value of the aberrations, it is shown that the opticalimaging lens 7 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.311 and the system length asshort as about 5.791 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 7 in the presentembodiment may be shorter.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 8 having six lenselements of the optical imaging lens according to an eighth exampleembodiment. FIG. 35 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 36 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment.

As shown in FIG. 34, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the eighth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L5A2 of the fifth lenselement L5, a periphery region L5A2P may be convex. Please refer to FIG.36 for the optical characteristics of each lens elements in the opticalimaging lens 8 of the present embodiment, and please refer to FIG. 55for the values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3),(EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 35(a), the offsetof the off-axis light relative to the image point may be within about−0.03˜0.015 mm. As the curvature of field in the sagittal directionshown in FIG. 35(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.10˜0.05 mm. Asthe curvature of field in the tangential direction shown in FIG. 35(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.15˜0.25 mm. As shown in FIG. 35(d), thevariation of the distortion aberration may be within about −4.5˜1.5%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in both the sagittal and tangentialdirections and the distortion aberration may be smaller here.

According to the value of the aberrations, it is shown that the opticalimaging lens 8 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.021 and the system length asshort as about 5.847 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 8 in the presentembodiment may be shorter.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 9 having six lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 39 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 40 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment.

As shown in FIG. 38, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the ninth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L5A2 of the fifth lenselement L5, a periphery region L5A2P may be convex. Please refer to FIG.40 for the optical characteristics of each lens elements in the opticalimaging lens 9 of the present embodiment, please refer to FIG. 55 forthe values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 39(a), the offsetof the off-axis light relative to the image point may be within about−0.06˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 39(b), the focus variation with regard to the three wavelengthsin the whole field may fall within about -0.08-0 mm. As the curvature offield in the tangential direction shown in FIG. 39(c), the focusvariation with regard to the three wavelengths in the whole field mayfall within about −0.1˜0.12 mm. As shown in FIG. 39(d), the variation ofthe distortion aberration may be within about −7˜2%. Compared with thefirst embodiment, the longitudinal spherical aberration and thecurvature of field in both the sagittal and tangential directions may besmaller here.

According to the value of the aberrations, it is shown that the opticalimaging lens 9 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.108 1 and the system length asshort as about 6.079 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 9 in the presentembodiment may be shorter.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 10 having six lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 43 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 44 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 45 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment.

As shown in FIG. 42, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the tenth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2 and L5A2; but the configuration ofthe concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object sideA1 and the image-side surfaces L1A2, L2A2, L3A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L4A2 of the fourth lenselement L4, an optical axis region L4A2C may be convex; on theimage-side surface L5A2 of the fifth lens element L5, a periphery regionL5A2P may be convex. Please refer to FIG. 44 for the opticalcharacteristics of each lens elements in the optical imaging lens 10 ofthe present embodiment, and please refer to FIG. 55 for the values of(T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 43(a), the offsetof the off-axis light relative to the image point may be within about−0.06˜0.08 mm. As the curvature of field in the sagittal direction shownin FIG. 43(b), the focus variation with regard to the three wavelengthsin the whole field may fall within about −0.12˜0.08 mm. As the curvatureof field in the tangential direction shown in FIG. 43(c), the focusvariation with regard to the three wavelengths in the whole field mayfall within about −0.2˜0.2 mm. As shown in FIG. 43(d), the variation ofthe distortion aberration may be within about −10˜0%.

According to the value of the aberrations, it is shown that the opticalimaging lens 10 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.202 1 and the system length asshort as about 5.510 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 10 in the presentembodiment may be shorter.

Reference is now made to FIGS. 46-49. FIG. 46 illustrates an examplecross-sectional view of an optical imaging lens 11 having six lenselements of the optical imaging lens according to an eleventh exampleembodiment. FIG. 47 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 11 according to the eleventh embodiment. FIG. 48 shows an exampletable of optical data of each lens element of the optical imaging lens11 according to the eleventh example embodiment. FIG. 49 shows anexample table of aspherical data of the optical imaging lens 11according to the eleventh example embodiment.

As shown in FIG. 46, the optical imaging lens 11 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the eleventh embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: on the image-side surface L5A2 of the fifth lenselement L5, a periphery region L5A2P may be convex. Please refer to FIG.48 for the optical characteristics of each lens elements in the opticalimaging lens 11 of the present embodiment, and please refer to FIG. 55for the values of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3),(EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5,(EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45),(AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and(AAG+T6)/T3 of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 47(a), the offsetof the off-axis light relative to the image point may be within about−0.018˜0.016 mm. As the curvature of field in the sagittal directionshown in FIG. 47(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.06˜0.02 mm. Asthe curvature of field in the tangential direction shown in FIG. 47(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.08˜0.12 mm. As shown in FIG. 47(d), thevariation of the distortion aberration may be within about −3˜1.5%.Compared with the first embodiment, the longitudinal sphericalaberration, the curvature of field in both the sagittal and tangentialdirections and the distortion aberration may be smaller here.

According to the value of the aberrations, it is shown that the opticalimaging lens 11 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.042 1 and the system length asshort as about 5.797 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture may be greaterand the system length of the optical imaging lens 11 in the presentembodiment may be shorter.

Reference is now made to FIGS. 50-53. FIG. 50 illustrates an examplecross-sectional view of an optical imaging lens 12 having six lenselements of the optical imaging lens according to a twelfth exampleembodiment. FIG. 51 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 12 according to the twelfth embodiment. FIG. 52 shows an exampletable of optical data of each lens element of the optical imaging lens12 according to the twelfth example embodiment. FIG. 53 shows an exampletable of aspherical data of the optical imaging lens 12 according to thetwelfth example embodiment.

As shown in FIG. 50, the optical imaging lens 12 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the twelfth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surfaces L5A1, L6A1 and the image-side surfacesL4A2, L5A2; but the configuration of the concave/convex shape ofsurfaces, comprising the object-side surfaces L1A1, L2A1, L3A1 and L4A1facing to the object side A1 and the image-side surfaces L1A2, L2A2,L3A2 and L6A2 facing to the image side A2, and positive or negativeconfiguration of the refracting power of each lens element, except thesixth lens element L6, may be similar to those in the first embodiment.The sixth lens element L6 has positive refracting power. Specifically,the differences of configuration of surface shape may include: on theimage-side surface L4A2 of the fourth lens element L4, an optical axisregion L4A2C may be convex and a periphery region L4A2P may be concave;on the object-side surface L5A1 of the fifth lens element L5, aperiphery region L5A1P may be convex; on the image-side surface L5A2 ofthe fifth lens element L5, a periphery region L5A2P may be convex; andon the object-side surface L6A1 of the sixth lens element L6, aperiphery region L6A1P may be convex. Please refer to FIG. 52 for theoptical characteristics of each lens elements in the optical imaginglens 12 of the present embodiment, and please refer to FIG. 55 for thevalues of (T4+AAG)/T2, HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT,(T1+T4+G34+G45)/(G12+G56), (AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6),(EFL+TL)/ALT, (T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3,EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of thepresent embodiment.

As the longitudinal spherical aberration shown in FIG. 51(a), the offsetof the off-axis light relative to the image point may be within about−0.015˜0.025 mm. As the curvature of field in the sagittal directionshown in FIG. 51(b), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.09˜0.2 mm. Asthe curvature of field in the tangential direction shown in FIG. 51(c),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.09˜0.08 mm. As shown in FIG. 51(d), thevariation of the distortion aberration may be within about −18˜2%.Compared with the first embodiment, the longitudinal sphericalaberration and the curvature of field in the tangential direction may besmaller here.

According to the value of the aberrations, it is shown that the opticalimaging lens 12 of the present embodiment, with the HFOV as large asabout 58.500 degrees, Fno as small as 2.281 1 and the system length asshort as about 6.370 mm, may be capable of providing good imagingquality. Compared with the first embodiment, the aperture in the presentembodiment may be greater.

Please refer to FIGS. 54 and 55, which show the values of (T4+AAG)/T2,HFOV/ImgH, EFL/(T1+T3), (EFL+T2+T5+T6)/ALT, (T1+T4+G34+G45)/(G12+G56),(AAG+T1)/T5, (EFL+TTL)/BFL, EFL/(T5+T6), (EFL+TL)/ALT,(T2+T4+G34+G56)/(G12+G23+G45), (AAG+T2)/T3, EFL/(T2+T3+T4), (EFL+AAG)/BFL, (T2+T6+G45+G56)/T5 and (AAG+T6)/T3 of all twelve embodiments, andthe optical imaging lens of the present disclosure may satisfy at leastone of the Inequality (1) and/or Inequalities (2)˜(18). Further, anyrange of which the upper and lower limits defined by the valuesdisclosed in all of the embodiments herein may be implemented in thepresent embodiments.

According to above illustration, the longitudinal spherical aberration,curvature of field in both the sagittal direction and tangentialdirection and distortion aberration in all embodiments may meet the userrequirement of a related product in the market. The off-axis light withregard to three different wavelengths (470 nm, 555 nm, 650 nm) may befocused around an image point and the offset of the off-axis lightrelative to the image point may be well controlled with suppression forthe longitudinal spherical aberration, curvature of field both in thesagittal direction and tangential direction and distortion aberration.The curves of different wavelengths may be close to each other, and thisrepresents that the focusing for light having different wavelengths maybe good to suppress chromatic dispersion. In summary, lens elements aredesigned and matched for achieving good imaging quality.

While various embodiments in accordance with the disclosed principlesare described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof example embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages. Further, all of the numerical ranges including the maximumand minimum values and the values therebetween which are obtained fromthe combining proportion relation of the optical parameters disclosed ineach embodiment of the present disclosure are implementable.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element and a sixth lens element sequentially from an object sideto an image side along an optical axis, each of the first, second,third, fourth, fifth and sixth lens elements having an object-sidesurface facing toward the object side and allowing imaging rays to passthrough and an image-side surface facing toward the image side andallowing the imaging rays to pass through, wherein: the first lenselement has negative refracting power; a periphery region of theimage-side surface of the second lens element is concave; an opticalaxis region of the object-side surface of the third lens element isconvex; an optical axis region of the image-side surface of the fifthlens element is convex; an optical axis region of the object-sidesurface of the sixth lens element is convex, and a periphery region ofthe object-side surface of the sixth lens element is concave; theoptical imaging lens comprises no other lens elements beyond the sixlens elements; and a half field of view angle of the optical imaginglens is represented by HFOV, an image height of an image produced by theoptical imaging lens on an image plane is represented by ImgH, aneffective focal length of the optical imaging lens is represented byEFL, a thickness of the second lens element along the optical axis isrepresented by T2, a thickness of the fifth lens element along theoptical axis is represented by T5, a thickness of the sixth lens elementalong the optical axis is represented by T6, a sum of the thicknesses ofall six lens elements along the optical axis is represented by ALT, andHFOV, ImgH, EFL, T2, T5, T6 and ALT satisfy:15.000°/mm≤HFOV/ImgH≤30.000°/mm; and0.800≤(EFL+T2+T5+T6)/ALT≤1.600.
 2. The optical imaging lens according toclaim 1, a thickness of the first lens element along the optical axis isrepresented by T1, a thickness of the third lens element along theoptical axis is represented by T3, and EFL and AAG satisfy theinequality:EFL/(T1+T3)≤3.900.
 3. The optical imaging lens according to claim 1,wherein EFL, T5 and T6 satisfy the inequality:0.900≤EFL/(T5+T6)≤2.300.
 4. The optical imaging lens according to claim1, wherein a sum of a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis, a distance from the image-side surface of the fourthlens element to the object-side surface of the fifth lens element alongthe optical axis and a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by AAG, a thickness of the third lenselement along the optical axis is represented by T3, and AAG, T2 and T3satisfy the inequality:0.900≤(AAG+T2)/T3≤2.500.
 5. The optical imaging lens according to claim1, wherein a thickness of the third lens element along the optical axisis represented by T3, a thickness of the fourth lens element along theoptical axis is represented by T4, and EFL, T2, T3 and T4 satisfy theinequality:EFL/(T2+T3+T4)≤3.200.
 6. The optical imaging lens according to claim 1,wherein a sum of a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis, a distance from the image-side surface of the fourthlens element to the object-side surface of the fifth lens element alongthe optical axis and a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by AAG, a thickness of the third lenselement along the optical axis is represented by T3, and AAG, T6 and T3satisfy the inequality:0.900≤(AAG+T6)/T3≤3.100.
 7. The optical imaging lens according to claim1, wherein a periphery region of the object-side surface of the fourthlens element is concave.
 8. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element and a sixth lens element sequentially from an object sideto an image side along an optical axis, each of the first, second,third, fourth, fifth and sixth lens elements having an object-sidesurface facing toward the object side and allowing imaging rays to passthrough and an image-side surface facing toward the image side andallowing the imaging rays to pass through, wherein: the first lenselement has negative refracting power; a periphery region of theobject-side surface of the second lens element is convex; an opticalaxis region of the image-side surface of the fourth lens element isconcave; an optical axis region of the image-side surface of the fifthlens element is convex; an optical axis region of the object-sidesurface of the sixth lens element is convex; the optical imaging lenscomprises no other lens elements beyond the six lens elements; and ahalf field of view angle of the optical imaging lens is represented byHFOV, an image height of an image produced by the optical imaging lenson an image plane is represented by ImgH, and HFOV and ImgH satisfy:15.000°/mm≤HFOV/ImgH≤30.000°/mm.
 9. The optical imaging lens accordingto claim 8, wherein an effective focal length of the optical imaginglens is represented by EFL, a thickness of the first lens element alongthe optical axis is represented by T1, a thickness of the third lenselement along the optical axis is represented by T3, and EFL, T1 and T3satisfy the inequality:1.000≤EFL/(T1+T3)≤3.900.
 10. The optical imaging lens according to claim8, wherein an effective focal length of the optical imaging lens isrepresented by EFL, a thickness of the second lens element along theoptical axis is represented by T2, a thickness of the fifth lens elementalong the optical axis is represented by T5, a thickness of the sixthlens element along the optical axis is represented by T6, a sum of thethicknesses of all six lens elements along the optical axis isrepresented by ALT, and EFL, T2, T5, T6 and ALT satisfy the inequality:0.800≤(EFL+T2+T5+T6)/ALT≤1.600.
 11. The optical imaging lens accordingto claim 8, wherein an abbe number of the third lens element isrepresented by V3, an abbe number of the second lens element isrepresented by V2, an abbe number of the fourth lens element isrepresented by V4, and V3, V2 and V4 satisfy the inequality:V3>V2+V4.
 12. The optical imaging lens according to claim 8, wherein anabbe number of the fifth lens element is represented by V5, an abbenumber of the second lens element is represented by V2, an abbe numberof the fourth lens element is represented by V4, and V5, V2 and V4satisfy the inequality:V5>V2+V4.
 13. The optical imaging lens according to claim 8, wherein aneffective focal length of the optical imaging lens is represented byEFL, a sum of a distance from the image-side surface of the first lenselement to the object-side surface of the second lens element along theoptical axis, a distance from the image-side surface of the second lenselement to the object-side surface of the third lens element along theoptical axis, a distance from the image-side surface of the third lenselement to the object-side surface of the fourth lens element along theoptical axis, a distance from the image-side surface of the fourth lenselement to the object-side surface of the fifth lens element along theoptical axis and a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by AAG, a back focal length of theoptical imaging lens, which is defined as the distance from theimage-side surface of the sixth lens element to the image plane alongthe optical axis, is represented by BFL, and EFL, AAG and BFL satisfythe inequality:1.400≤(EFL+AAG)/BFL≤3.100.
 14. The optical imaging lens according toclaim 8, wherein a sum of a distance from the image-side surface of thefirst lens element to the object-side surface of the second lens elementalong the optical axis, a distance from the image-side surface of thesecond lens element to the object-side surface of the third lens elementalong the optical axis, a distance from the image-side surface of thethird lens element to the object-side surface of the fourth lens elementalong the optical axis, a distance from the image-side surface of thefourth lens element to the object-side surface of the fifth lens elementalong the optical axis and a distance from the image-side surface of thefifth lens element to the object-side surface of the sixth lens elementalong the optical axis is represented by AAG, a thickness of the firstlens element along the optical axis is represented by T1, a thickness ofthe fifth lens element along the optical axis is represented by T5, andAAG, T1 and T5 satisfy the inequality:0.900≤(AAG+T1)/T5≤2.400.
 15. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element and a sixth lens element sequentially from an object sideto an image side along an optical axis, each of the first, second,third, fourth, fifth and sixth lens elements having an object-sidesurface facing toward the object side and allowing imaging rays to passthrough and an image-side surface facing toward the image side andallowing the imaging rays to pass through, wherein: an optical axisregion of the image-side surface of the first lens element is concave;the sixth lens element has negative refracting power, and an opticalaxis region of the object-side surface of the sixth lens element isconvex; the optical imaging lens comprises no other lens elements beyondthe six lens elements; and a half field of view angle of the opticalimaging lens is represented by HFOV, an image height of an imageproduced by the optical imaging lens on an image plane is represented byImgH, an abbe number of the first lens element is represented by V1, anabbe number of the second lens element is represented by V2, an abbenumber of the fourth lens element is represented by V4, and HFOV, ImgH,V1, V2 and V4 satisfy:15.000°/mm≤HFOV/ImgH≤30.000°/mm, andV1>V2+V4.
 16. The optical imaging lens according to claim 15, wherein aneffective focal length of the optical imaging lens is represented byEFL, a thickness of the first lens element along the optical axis isrepresented by T1, a thickness of the third lens element along theoptical axis is represented by T3, and EFL, T1 and T3 satisfy theinequality:1.000≤EFL/(T1+T3)≤3.900.
 17. The optical imaging lens according to claim15, wherein an abbe number of the third lens element is represented byV3, and V3, V2 and V4 satisfy the inequality:V3>V2+V4.
 18. The optical imaging lens according to claim 15, wherein anabbe number of the fifth lens element is represented by V5, and V5, V2and V4 satisfy the inequality:V5>V2+V4.
 19. The optical imaging lens according to claim 15, wherein aneffective focal length of the optical imaging lens is represented byEFL, a thickness of the second lens element along the optical axis isrepresented by T2, a thickness of the third lens element along theoptical axis is represented by T3, a thickness of the fourth lenselement along the optical axis is represented by T4, and EFL, T2, T3 andT4 satisfy the inequality:0.700≤EFL/(T2+T3+T4)≤3.200.
 20. The optical imaging lens according toclaim 15, wherein the third lens element has positive refracting power.